/* Use these default settings, can be overridden */
static void set_defaults(shine_config_t *config)
{
L3_set_config_mpeg_defaults(&config->mpeg);
}
MP3Stream::MP3Stream(StreamsManager *pStreamsManager, string name)
: BaseAudioStream(pStreamsManager, ST_IN_AUDIO_MP3, name)
{
BaseAudioDevice *pAudioCapDevice= reinterpret_cast<BaseAudioDevice*> (HardwareManager::GetHardwareInstance(HT_MIC));
_pMP3streamCapabilities= new StreamCapabilities();
//pcmbuf = new uint8_t (PCM_PAGE_SIZE);
//mp3 config
L3_set_config_mpeg_defaults(&_mp3config.mpeg);
//wave config
_sampleRate = pAudioCapDevice->GetSampleRate();
_numOfChannel = pAudioCapDevice->GetNumberOfChannels();
_bitsPerSample = pAudioCapDevice->GetBitsPerSample();
_bitRate = _mp3config.mpeg.bitr;//
//set wave type, TODO: removed
_mp3config.wave.type = WAVE_RIFF_PCM;
_mp3config.wave.channels = _numOfChannel; //mono
_mp3config.wave.samplerate = _sampleRate;
_mp3config.wave.bits = _bitsPerSample;
//config sample rate index, and bit rate
_mp3config.mpeg.samplerate_index = L3_find_samplerate_index(_sampleRate, _mp3config.mpeg.type);
if ( _mp3config.mpeg.samplerate_index < 0)
FATAL ("invalid sample rate in mp3stream ctor"); //TODO: should throw an execption
_mp3config.mpeg.bitrate_index = L3_find_bitrate_index(_mp3config.mpeg.bitr, _mp3config.mpeg.type);
if (_mp3config.mpeg.bitrate_index < 0)
FATAL ("invliad bit rate in mpstream ctor");
open_bit_stream_w(&_bs, BITSSIZE);
memset ((char*) &_side_info, 0, sizeof(L3_side_info_t));
L3_subband_initialise();
L3_mdct_initialise();
L3_loop_initialise();
_mp3config.mpeg.mode_gr = (_mp3config.mpeg.type==1)? 2: 1;
_samplesInput = _mp3config.mpeg.samples_per_frame = (_mp3config.mpeg.type==1)? 1152:576;
//config->mpeg.total_frames = ();
_mp3config.mpeg.bits_per_slot = 8;
_sideinfo_len = 32;
if (_mp3config.mpeg.type==1) {
if (_numOfChannel==1)
_sideinfo_len += 136;
else
_sideinfo_len += 256;
}
else { //mpeg2
if (_numOfChannel==1)
_sideinfo_len += 72;
else
_sideinfo_len += 136;
}
if (_mp3config.mpeg.crc) _sideinfo_len += 16;
_avg_slots_per_frame = ((double)_samplesInput /
((double)_sampleRate/1000)) *
((double)_bitRate /
(double)_mp3config.mpeg.bits_per_slot);
_whole_slots_per_frame = (int)_avg_slots_per_frame;
_frac_slots_per_frame = _avg_slots_per_frame - (double)_whole_slots_per_frame;
_slot_lag = -_frac_slots_per_frame;
if (_frac_slots_per_frame==0)
_mp3config.mpeg.padding = 0;
DEBUG ("mp3 stream info: _sideinfo_len:%d sampleInput:%d bitRate:%d sampleRate:%d avg slots per frame:%d",
_sideinfo_len,
_samplesInput,
_bitRate,
_sampleRate,
_avg_slots_per_frame);
GETTIMESTAMP(ats);
mp3Duration=(1000.0/(double)_sampleRate)*(double)(_samplesInput/_numOfChannel); //m second
_pMP3streamCapabilities->aac.InitAACCapability(_sampleRate, _numOfChannel, _bitsPerSample, (samplesInput/_numOfChannel),
(_bitRate* 1000 *_numOfChannel), mp3Duration); //bitrate: 2 channel
_pMP3streamCapabilities->audioCodecId = CODEC_AUDIO_MP3;
#ifdef MP3STREAM_DEBUG
if((pfOutputMP3=fopen("MICOut.mp3", "wb")) == NULL){
FATAL("Open output file 'MICOut.mp3' fail... !!\n");
exit(1);
}
if((pfPCM=fopen("MICOut.wav", "wb")) == NULL){
FATAL("Open output file 'MICOut.mp3' fail... !!\n");
exit(1);
}
DEBUG("Initial MP3Stream End..!!\n");
#endif
}